AAE-38169 Allow controlling the git SHA when creating a gh deployment status

[atchertchian]

Checklist

• Jira Reference (also in PR title):
• README updated after adding/changing behaviour of an action
• Proposed version increment for release:
  • Patch (bugfix)
  • Minor (new feature)
  • Major (breaking changes)
• External PR link where changes has been tested:

Description

[Copilot]

Pull Request Overview

Adds ability to specify a custom git SHA when creating a GitHub deployment so that deployments can reference commits other than the workflow trigger commit.

• Introduces new input git-sha to github-deployment-create action and wires it into deployment creation.
• Updates README with a brief note about optional SHA.
• Bumps version to v9.2.0 (minor feature addition).

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
version.txt	Minor version bump to reflect new optional input feature.
docs/README.md	Adds a sentence noting an optional git SHA can be provided (may need fuller parameter documentation).
.github/actions/github-deployment-create/action.yml	Adds git-sha input and uses it (with fallback) when creating the deployment.